Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:06:50 2013

Optimize a model with 8473 rows, 1369 columns and 26011 nonzeros
Presolve removed 1398 rows and 710 columns
Presolve time: 0.06s
Presolved: 7075 rows, 659 columns, 21701 nonzeros
Variable types: 14 continuous, 645 integer (645 binary)
Found heuristic solution: objective 27698.000000

Root relaxation: objective 2.151915e+04, 2650 iterations, 0.08 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 21519.1520    0    9 27698.0000 21519.1520  22.3%     -    0s
H    0     0                    21543.000000 21519.1520  0.11%     -    0s
H    0     0                    21536.000000 21519.1520  0.08%     -    0s
H    0     0                    21532.000000 21519.1520  0.06%     -    0s
     0     0 21520.7374    0   24 21532.0000 21520.7374  0.05%     -    0s
     0     0 21520.7374    0    8 21532.0000 21520.7374  0.05%     -    0s
     0     0 21521.7230    0   25 21532.0000 21521.7230  0.05%     -    0s
     0     1 21521.8269    0   25 21532.0000 21521.8269  0.05%     -    0s
H    3     3                    21530.000000 21521.8269  0.04%   0.0    0s
H   10     7                    21529.000000 21524.8861  0.02%   0.0    0s

Cutting planes:
  Gomory: 10
  Cover: 2
  MIR: 20
  Zero half: 6

Explored 34 nodes (3239 simplex iterations) in 0.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.152900000000e+04, best bound 2.152700000000e+04, gap 0.0093%